TM-9-2320-273-10

TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; OPERATOR’S MANUAL

DECEMBER 2012

TM-9-2320-273-10 - Page 372 of 452

ADDING COOLANT TO PARTIALLY EMPTY COOLING SYSTEM

WARNING

Let radiator cool before removing cap. Remove radiator cap

in two steps. First, place a thick cloth over the cap and

slowly rotate cap left to its ﬁrst stop, pause, and let pressure

escape from cooling system. Then rotate cap further left until

you can remove it. Failure to comply may result in serious

burns. Seek medical attention in the event of an injury.

Leaking or spilled coolant may cause a slip and fall hazard.

When draining cooling system, clean any leaking or spilled

coolant immediately using suitable absorbent materials.

Dispose of contaminated cloths, rags, or cleaning materials

in accordance with local procedures and plans. Failure to

comply may result in injury to personnel. Seek medical

attention in the event of an injury.

NOTE

Fill cooling system with a mixture of clean water and

antifreeze. If unknown, notify supervisor for proper mixture

of water and antifreeze.

1. Remove radiator cap (Figure 5, Item 1) from radiator ﬁller neck

(Figure 5, Item 3).

2. Add coolant through radiator ﬁll neck (Figure 5, Item 3) until coolant level is

even with top of sight glass (Figure 5, Item 2).

3. Open and close oil cooler drain cock (Figure 6, Item 3) and thermostat manifold

drain cock (Figure 6, Item 2) to allow any residual air to escape from cooling

system.

4. Recheck coolant level and add coolant as necessary until coolant level is even

with top of radiator sight glass (Figure 5, Item 2).

5. Install radiator cap (Figure 5, Item 1) on radiator ﬁller neck (Figure 5, Item 3).

6. Check for leaks.

TM 9-2320-273-10

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